全国民主党大会去年在芝加哥举行。

The national Democratic ___convention was held in Chicago last year.

这次他们将在哪里举行党的代表大会？

Where are they holding their party ___convention this time?

翻修后的历史建筑是举办现代科学大会的完美场所。

The renovated historic building is perfect for hosting a modern scientific ___convention.